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, Ofi 1936. E, POOLE 2,056,534

COIL LEAD STAKING DEVICE Filed July 9, 1934 4 Sheets-Sheet 1 my INVENTOR v ATTORNEY Oct. 6, 1936 L. E. POOLE COIL LEAD STAKING DEVICE Filed July 9, 1934 4 Sheets-Sheet 5 OZZM' Y%% ATTORN EY Oct. 6, 1936. L. E. POOLE COIL LEAD STAKING DEVICE Filed July 9, 1934 4 Sheets-Sheet 4 262K266 INVENTOR 0 2% 5% BY wfiflmvfl/ ATTORNEY/4 Patented Oct. 6, 1936 2,056,534

UNITED STATES PATENT OFFICE 50 which, as shown in Fig. 1, is mounted on a supporting bed or table 52. Carried by frame 50 are the various elements and devices of the machine such as workholder A, the staking device B and the indexing device C. Frame 50 is provided with two annular recesses 54 and 56 providing bearing surfaces 58 and 60, respectively, for a sleeve 62, having a cup-shaped end 64 which is adapted to receive part of an armature 28. Press-fitted into sleeve 62 is another sleeve 65, one end of which is provided with a bushing 66, adapted to receive one end of the armature shaft 68. Sleeve 62 is retained within frame 50 by means of a nut 10 threadedly received by one end of sleeve 62 and normally retaining the shoulder 12 thereof in engagement with the annular surface 14 of frame 50 by intermediation of an indexing ratchet 16 and a notched ring member 18, both on sleeve 62. As best shown in Fig. 3, frame 50 is provided with two spaced bearing lugs 80 which pivotally receive at 82 a bearing block 84, having a semi-cylindrical bearing surface 86 on which rests an enlarged cylindrical portion 88 of the armature shaft so that the proper bearing end 98 thereof is not in the least damaged by pressure exertion caused by a stacking and cutting operation which takes place close to said bearing end 90. The earlier described pilot 40 is attached by a plurality of screws 82 to the bearing block 84. As best shown in Fig. 4 the greater mass of the bearing block is above and to one side of the pivot support 82 so that the bearing block has a tendency to gravitate into the position shown in Fig. 1. In order to retain the bearing block 84 in bearing position as shown in Fig. 4, the same is provided with a shoulder 94 with which cooperates the shoulder 96 of a spring urged lever 98 which is pivotally mounted at I to a depending lug I02 of frame 50. After all top leads 20 of an armature have been staked into their respective commutator slots 38, the operator merely depresses lever 98 whereupon the bearing block 84 gravitates from the position shown in Fig. 4 to that shown in Fig. 1, thereby permitting the ready removal of the assembled armature from the workholder.

It may be stated in advance that the sleeve 62 is indexed wherefore the armature 28, in order to be indexed, must be clamped to said sleeve 62. As best shown in Fig. 8 a clamping ring I04 of sheet metal is floatingly pivotally mounted at I06 to the cup-shaped end 64 of sleeve 62. This clamping ring I04 is also provided with two spaced lugs I08 diagonally opposite the floating pivot support I06 and receives in a peripheral slot IIO intermediate the two lugs I08 a movable jaw II2 which cooperates with an eccentric I I4, pivoted at II6 to the lugs I08, the pivot connection extending into the cup-shaped end 64 of sleeve 62 thereby establishing a second pivotal support for the clamping ring I84. Integral with the eccentric H4 is an operating lever H8. The clamping ring I04 is provided with a plurality of angularly spaced, internal serrated portions I20 and the jaw II 2 is similarly serrated, so that upon manual rotation of the eccentric I I4 clockwise as viewed in Fig. 8 into the position shown therein, the serrated internal portions I20 of the clamping ring and theserrated face I22 of jaw II2 grip the periphery I24 of armature 28 thereby clamping the latter to the intermittently rotated sleeve 62. It is obvious that the clamping ring I24 is sufficiently fioatingly supported so as not to exert unequal radial pressures against the periphery of the armature 28. It has been explained earlier that the operator, before clamping a new armature to the sleeve 62, aligns one of the commutator slots 38 with the face 42 of the pilot 40. Since all of the commutator slots are equi-angularly spaced and since the sleeve 62 is indexed an angular distance equal to that between consecutive commutator slots, it follows that with each indexing of the armature a new commutator slot aligns with the face 42 of pilot 40.

Staking device B and cutting knife D Referring particularly to Figs. '2, 3 and 4, frame 50 pivotally supports at I30 a pedestal I32, having a depending arm I34 which is secured to frame 50 by means of a bolt I36 so as to prevent rocking of the pedestal on its pivot support I30. Mounted on pedestal I32 by a plurality of bolts I38 is a bearing I40, consisting of two halves I42 and I44, in which is slidable a cylindrical sleeve I46, carrying at its lower end a block I48 of the shape shown more particularly in Figs. 2 and 3. A plurality of nuts I52, threaded over the opposite end of sleeve I46, serve as a stop means against vertical downward movement of the sleeve beyond the position shown in Fig. 4. Connected to sleeve I46 by a clevis I54 is the core I 56 of a solenoid I58 which is attached in any suitable manner to pedestal I32. The solenoid core I56 extends considerably into a shell I60 and is provided at the top with a collar I62 against which bears one end of a com"- pressed spring I64 (see Fig. the opposite end of said spring bearing against the top of the solenoid I58 so that the solenoid core I56, sleeve I46 and block I48 are normally retained in the inoperative position shown in Figs. 1 or 2. Upon energization of the solenoid I 58, the solenoid core I56 and the parts connected therewith are moved into the position shown in Figs. 3 or 4. during which movement a staking blade I66, secured to block I48, engages and moves a. top-lead 20, held by the operator against the guiding face 42 of pilot 40, along this guiding face 42 and into the aligned commutator slot 38. During such movement of block I48, a knife I68 also approaches and severs a length of a previously staked coil lead which protrudes from a commutator slot. This knife I68 is received in a rectangular groove I12 of block I48 and re tained therein in properly adjusted position by means of a plurality of set screws I14 and I16, set screws I14 engaging a side surface and set screw I16 engaging the top surface I18 of the cutting knife I68.

It appears from Fig. 2 that the leads 20 to be staked by this machine are displaced by the operator toward the left as viewed in Fig. 2 and. with respect to the armature grooves 26 from which they emerge. In order firmly to pack the angularly displaced leads against the underlying coil leads, block I48 receives in a groove I80 a packing bar I82 which is retained therein by a plurality of screws I84. As best shown in Fig. 9, this packing bar I82 firmly packs that portion of a lead 28 which is closest to the armature core. Attached in any suitable manner to block I48 adjacent the commutator of the armature is a packing blade I86, having a. V-shaped surface I88 (see Fig. 1) which is adapted during a work stroke of block I48 firmly to pack those portions of the top leads 20 which are adjacent the commutator against the earlier staked bottom leads.

Indexing device 0 Referring more particularly to Figs. 4 to 7 inclusive, frame 50 is provided with an extension I90, providing a rectangular groove I92 in which is received a vertically slidable bar I94, retained in said groove by a cover plate I96. Pivotally mounted at I96 within a recess 206 of bar I94 is a pawl 262 which is in alignment with the earlier mentioned indexing ratchet 16 and urged into engagement with the teeth 264 thereof by a spring urged plunger 266. As best shown in Fig. 6, the indexing ratchet 16 is keyed to the sleeve 62 as at 268. It appears from Fig. 6 that during movement of bar I94 in the direction of arrow 2 I6, the ratchet disc 16 and the parts connected therewith will be indexed an angular distance equal to that between consecutive teeth 264 of said ratchet disc. As best shown in Fig. 5a, bar I 94 is pivotally connected at 2I2 to the core 2I4 of a solenoid 2I6 by means of a rod 2I8. This rod 2I8 passes through the base portion 226 of a bracket 222 which is secured in any suitable manner to frame 56. Interposed between a collar 224 of rod 2 I8 and the base portion 220 of bracket 222 is a compression spring 226 which normally urges bar I64 into the dotand-dash position disclosed in Fig. 6. The solenoid 2I6 is secured to an angle 228 which in turn is mounted in any suitable manner on table 52. Energization of solenoid 2I6 results in movement of solenoid core 2I4 and bar I94 in the direction of arrow 2I0 in Fig. 6, against the tendency of spring 226, whereby the pawl 262 indexes the ratchet disc and therewith the armature 26 which is clamped to sleeve 62.

Since the bar I94 travels very rapidly in the indexing direction, under the influence of the energized solenoid the ratchet disc 264 gains such momentum as to have a tendency to overtravel its assigned indexing movement. .In order to prevent such over-travel of the ratchet disc and therewith of the armature assembly in the workholder A, the earlier mentioned ring member 18 is keyed at 236 to the sleeve 62. This ring member 18 is provided with as many equiangularly spaced, V-shaped peripheral notches 232a as the ratchet disc 16 has teeth 264. Received by the frame extension I96 is a spring pressed plunger 234 which has a V-shaped end 236, adapted to register with the notches 232a. In order to prevent rotation of the plunger end 236 relative to the notches 232 of ring member 16, the plunger carries a pin 238 the projecting ends of which are received in diametrically opposite longitudinal slots 240 of a spring retainer 242 which is secured to the frame extension I96 in any suitable manner. Bar I94 pivotally supports at 244 an arm 246, one end of which receives an adjustable set screw in axial alignment with the plunger 234. Interposed between the opposite end of arm 246 and a depending plate 256 which is secured to the frame extension I66, and surrounding a bolt 252, extending from said plate 250, is a compressed spring 254 which normally tends to rock arm 246 counterclockwise as viewed in Fig. '1 into engagement with a stop nut 256 which is received by the bolt 252. It is obvious that during the rapid indexing movement of bar I94 the set screw 246 of arm 246 engages the plunger 234 whereby said arm is rocked clockwise as viewed in Fig. 'I and the spring 254 is further compressed. Such increasing compression of spring 254 is transmitted to the plunger 234 in support of compression spring 258 which directly urges the plunger 234 into registry with the notch 2320. after a completed indexing'operation and effectively resists the tendency of the ratchet disc to over-travel. Upon de-energization of the solenoid 2I6, spring 226 returns bar I94 into the position shown in Fig. 5a in which the arm 246 is clearly out of engagement with plunger 234 and instead is in engagement with the stop nut 256. Incidentally the ratchet 16 has the same number of teeth 204 as the commutator has bars.

Control of machine Once an armature has been properly located by the operator in the machine; the two solenoids I56 and H6 operate the machine until all coil leads 26 have been staked into the commutator slots. Referring particularly to Fig. it, there will now be described the switch arrangement by which the energization of the two mentioned solenoids is effected. The solenoids I58, 2|6 are connectible across a D. C. power line 264, 266 through an interlocking magnetic switch 216 having a movable switch element 212 which is normally held in the open position shown in Fig. 10 by any suitable spring means (not shown). A control circuit, connected across the D. C. line 264, 266, includes a normally open push-button switch 214 and a holding coil 216. Upon closing of switch 214 by the operator, the holding coil 216 is energized and causes movement of switch element 212 into closing engagement with the contacts 218 of switch 216 whereby the solenoid I53 is energized and a staking operation takes place. Another control circuit, connected also across the D. C. line 264, 266, includes a normally open push button switch 286 and a holding coil 292. Upon closing of switch 286 by the operator, the holding coil 282 is energized and causes movement of switch element 212 into closing engagement with the contacts 284 of switch 216 whereby the solenoid H6 is energized and an indexing operation takes place. In order to prevent arc formation between the breaking contacts of switch 210, condensers 286 are provided in the manner indicated in Fig. 10. As shown in Fig. l, the two switches 214, 280 are mounted in any conventional switch box 296, whereas the magnetic switch 210 (not shown) may be located underneath the table 52.

It is obvious from the foregoing description that with the switch arrangement disclosed, the operator cannot cause the simultaneous operation of the staking device and the indexing device, even though he accidentally actuates both switches 214,280 at the same time.

While the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

I claim:

1. In a staking device, the combination of a rotatable support receiving one end of the shaft of an armature assembly including armature core, coils and a slotted commutator; a relatively stationary member for rotatably supporting the other end of the armature shaft; means engageable with the armature core for coupling the armature to said rotatable support; and means for staking an armature coil lead into a commutator slot.

2. In a staking device, the combination of a rotatable support receiving one end of the shaft of an armature assembly including armature coils and a slotted commutator; a relatively stationary member for rotatably supporting the other end of the armature shaft; means for coupling the armature to said rotatable support; means for staking an armature coil lead into a commutator slot; and means for indexing the rotatable support tobring successive commutator slots into alignment with the staking means.

3. In a staking device, the combination of means including a member rotatable about the axis of the shaft of an armature assembly including armature coils and a slotted commutator to support said assembly for unitary rotation with the member; means providing a face against which an armature coil lead is held, said face extending in close proximity to the commutator periphery; means for moving the lead along said face and into an aligned commutator slot; and means for indexing the member to align consecutive commutator slots with said face.

4. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator; means guiding an armature coil lead into an aligned commutator slot; and yielding means for moving the coil lead along said guiding means and into the aligned commutator slot.

5. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator; means providing a face against which an armature coil lead is held, said face extending in close proximity to the commutator periphery; a blade movable on said face and into an aligned commutator slot to force the lead on said face into said slot; and means for yieldingly moving the blade toward the commutator.

6. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator; means providing a face against which an armature coil lead is held, said face extending in close proximity to the commutator periphery; a blade movable on said face and into an aligned commutator slot to force the lead on said face into said slot; and a solenoid for yieldingly moving the blade toward the commutator.

'7. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator; and means for simultaneously staking an armature coil lead into a commutator slot and severing the end of a previously staked coil lead which protrudes from another commutator slot.

8. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator; means guiding a coil lead into a commutator slot; and means for simultaneously moving a coil lead along said guiding means and into an aligned commutator slot and severing the end of a previously staked coil lead which protrudes from another commutator slot.

9. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator; means guiding an armature coil lead into a commutator slot; a reciprocable member; a blade on said member for moving a coil lead along said guiding means and into an aligned commutator slot; and means on said member cooperating with the periphery of the commutator for severing the end of a previously staked coil lead which protrudes from another commutator slot.

10. In a staking device, the combination with coil lead staking means, of a rotatable support receiving one end of the shaft of an armature assembly which includes armature coils and a slotted commutator; a pivotally mounted member for rotatably supporting the other end of the armature shaft, said member normally gravitating into non-supporting position in which the armature assembly may be longitudinally removed from the support; and a manually releasable latch normally retaining the member in supporting position.

11. In a staking device, the combination of a rotatable support receiving one end of the shaft of an armature assembly which includes armature coils and a slotted commutator; a pivotally mounted member for rotatably supporting the other end of the armature shaft, said member normally gravitating into non-supporting position in which the armature assembly may be longitudinally removed from the support; a manually releasable latch normally retaining the member in supporting position; and means for simultaneously staking an armature coil lead into a commutator slot and severing the end of a previously staked coil lead which protrudes from another commutator slot.

12. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator, said means including a pivotally mounted member for rotatably supporting one end of the armature shaft, said member normally gravitating into non-supporting position in which the armature assembly may be longitudinally removed from the supporting means; means carried by said member to guide a coil lead into a commutator slot when said member is in supporting position; a manually releasable latch normally retaining the member in supporting position; and means for moving a coil lead along said guiding means and into an aligned commutator slot.

13. In a staking device, the combination of a rotatable support receiving one end of the shaft of an armature assembly which includes armature coils and a slotted commutator; a pivotally mounted member for rotatably supporting the other end of the armature shaft, said member normally gravitating into non-supporting position in which the armature assembly may be longitudinally removed from the support; means carried by said member and providing a face against which an armature coil lead is held and which in the supporting position of the member extends in close proximity to the commutator periphery; a manually releasable latch normally retaining the member in supporting position; and means for moving a coil lead along said face and into an aligned commutator slot.

14. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator, said means including an element rotatable coaxially of the armature assembly; means for coupling the armature assembly to said element for unitary rotation; a ratchet on said element; a reciprocable pawl for indexing the ratchet; means for staking a coil lead into a commutator slot; andsolenoids for reciproeating the pawl and for operating the staking means.

15. In a staking device; the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator, said means including an element rotatable coaxially of the armature assembly; means for coupling the armature assembly to said element for unitary rotation; means for staking an armature coil lead into a commutator slot; a ratchet on said element; a reciprocable pawl for indexing the ratchet; solenoids for reciprocating the pawl and for operating the staking means; and a manually operable control instrumentality permitting the energization of only one solenoid at one time.

16. In a staking device, the combination of means rotatably supporting an armature assembly including armature coils and a slotted commutator; and a reciprocable member carrying means for staking a coil lead into a commutator slot, and means for forcing a portion of said coil lead adjacent the commutator below its periphery and another portion of said coil lead adjacent the armature core below its periphery.

17. In a staking device, the combination of means rotatably supporting an armature assembly including armature coils and a slotted commutator; and a reciprocable member carrying means for staking a coil lead into a commutator slot, means for severing the end of a previously staked coil lead which protrudes from another commutator slot, and means for forcing a portion of said one coil lead adjacent the commutator below its periphery and another portion of said one coil lead adjacent the armature core below its periphery.

18. In a staking device, the combination of means rotatably supporting an armature assembly including armature coils and a slotted commutator; a reciprocable member carrying means for staking a coil lead into a commutator slot, means for severing the end of a previously staked coil lead which protrudes from another commutator slot, and means for forcing a portion of said one coil lead adjacent the commutator below its periphery and another portion of said one coil lead adjacent the armature core below its periphery; and a solenoid for reciprocating the members.

19. In a staking device, the combination with means for rotatably supporting an armature assembly including armature coils and a slotted commutator, of means providing a face terminating in a corner and extending in close proximity to the commutator periphery, a coil lead being forced into engagement with said face by drawing the lead over said corner and the face guiding the lead into an aligned commutator slot upon movement of said lead along said face.

20. In a staking device, the combination with means for rotatably supporting an armature assembly including armature coils and a slotted commutator, of means providing a face terminating in a corner and extending radially of the commutator and in close proximity to the periphery thereof, a coil lead being forced into engagement with said face by drawing the lead over said corner and the face guiding the lead into an aligned commutator slot upon movement of said lead along said face.

21. In a staking device, the combination with means for rotatably supporting an armature assembly including armature coils and a slotted commutator, of means providing a face terminating in a corner and extending in close proximity to the commutator periphery, a coil lead being forced into engagement with said face by drawing the lead over said corner; and means for moving the coil lead along said face and into an aligned commutator slot.

22. In a staking device, the combination with means for rotatably supporting an armature assembly including armature coils and a slotted commutator, of means providing a face terminating in a corner and extending radially of the commutator and in close proximity to the periphery thereof, a coil lead being forced into engagement with said face by drawing the lead over said corner; and a blade movable on said face for forcing the lead thereon into an aligned commutator slot.

23. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator; means providing a face extending in close proximity to the commutator periphery; and yielding means for moving along the face and into an aligned commutator slot a coil lead held against said face.

24.. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator; means for simultaneously staking an armature coil lead into a commutator slot and severing the end of a previously staked coil lead which protrudes from another commutator slot; and means for indexing the armature assembly.

25. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator; means guiding an armature coil lead into a commutator slot; a reciprocable member; 21. blade on said member for moving a coil lead along said guiding means and into an aligned commutator slot; means on said member cooperating with the periphery of the commutator for severing the end of a previously staked coil lead which protrudes from another commutator slot; and yielding means for moving the member toward the commutator.

26. In a staking device, the combination of a rotatable support receiving one end of the shaft of an armature assembly which includes armature coils and a slotted commutator; a pivotally mounted member for rotatably supporting the otherendof the armature shaft, said member normally gravitating into non-supporting position in which the armature assembly may be longitudinally removed from the support; a manually releasable latch normally retaining the member in supporting position; means for coupling the armature assembly to the support; means for staking a coil lead into a commutator slot; and means for indexing the support.

2'7. In a staking device, the combination of a rotatable support receiving one end of the shaft of an armature assembly which includes armature coils and a slotted commutator; a pivotally mounted member for rotatably supporting the other end of the armature shaft, said member normally gravitating into non-supporting position in which the armature assembly may be longitudinally removed from the support; a manually releasable latch normally retaining the member in supporting position; means for simultaneously staking an armature coil lead into a commutator slot and severing the end of a previously staked coil lead which protrudes from another commutator slot; means for coupling the armature assembly to the support; and meansfor indexing the support.

28. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator, said means including an element rotatable coaxially of the armature assembly; means for coupling the armature assembly to said element for unitary rotation; a ratchet on said element; a reciprocable pawl for indexing the ratchet; and means for staking a coil lead into a commutator slot.

29. In a staking device, the combination of means for rotatably supporting an armature assembly including armature coils and a slotted commutator, said means including an element rotatable coaxially of the armature assembly; means for coupling the armature assembly to said element for unitary rotation; a ratchet on said element; a reciprocable pawl for indexing the ratchet; means for staking a coil lead into a commutator slot; and a solenoid for reciprocating the pawl.

LORA E. POOLE. 

